supports structured knowledge Search

[Luhuanz]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

First of all, I would like to thank the emergence of the tool dify, which made my LLM learning process smoother. One question is whether it supports structured knowledge base retrieval, not just PDF and txt. Similar to the structure of graphrag.

2. Additional context or comments

No response

3. Can you help us with this feature?

• I am interested in contributing to this feature.

[crazywoola]

Duplicated #6230 not supported yet.